The config file starts with uuid="{6ab09deb-429e-4ad4-b59d-e56dd24b2985}"/> and from there on it seems to be complete. I tried to rebuild the config file googling a complete file, and it seems to work ok (I only had to register again and re-configure some things)

I suspect the cause of this issue is I run out of space while running a Windows virtual machine, the machine entered a "pause" state, I freed a GB and continued running the VM without problems.